Found 340 races

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JUN
7

Denver, CO
$45
Celebrate five decades of running with Fleet Feet at The Big Run presented by Brooks. This timed community 5K on Global Running Day is all about summer vibes, shared memories and the kind of...
5K
12
JUN
7

Steamboat Springs, CO
$85 -$170
Join us in 2026 for the 45th annual running of the Steamboat Marathon, Half Marathon and 10k
10K Half Marathon Marathon
142
JUN
10

Idaho Springs, CO
Run the Mighty ARGO hill this summer in a 4 race series! This is a grass(gold)roots, backyard style event. Meet at 5pm in the park across from the Argo to pick up your wristband. Race starts at...
12
JUN
11

Boulder, CO
$15 -$20
Fun for all, from newcomers of any age racing for the first time to veteran competitors looking to test their fitness, all in a friendly, welcoming environment. We are back at CU Pott’s Field on...
1m
16
JUN
13

Skagway, AK
The Skagway Marathon, Half Marathon and Walking Half Marathon is an amazing race that takes place in the wilderness of Alaska. This 26-mile run climbs multiple hills as it traces its way through...
Half Marathon Marathon
15
JUN
13

Belfry, MT
$50 -$550
Is 24 Hours too much? We have an 8 Hour Solo option and General Fun Registration! Please read the event FAQ's before registering! Just when you’re itching to get on the trails but the snow is...
33
JUN
13

Fort Lupton, CO
DescriptionA certified 5k Race starts on South Harrison Avenue in front of the back parking lot. Start time 8:00am. Runners will take off first; Walkers immediately following. Packet Pick up at...
5K
24
JUN
13

Arvada, CO
$40 -$85
Join us for our 14th annual Summer Breeze, benefiting the Food Bank of the Rockies! This event features 5K, 10K, and Half Marathon courses that meander along the Van Bibber Creek Trail, offering...
5K 10K Half Marathon
526
JUN
13

Loveland, CO
$85
Are you ready to test your limits and honor our heroes? Join us for the 5th Annual Health4Heroes Guardian Games, an electrifying Military and First Responder-inspired fitness competition like no...
15
JUN
13

Parker, CO
$30
Fun 3 mile walk benefitting Habitat for Humanity of Metro Denver. June 13, 2026, 9 - noon  
7
JUN
13

Steamboat Springs, CO
$30 -$50
Let the trail races begin!! This is a challenging trail run on the scenic single track trails of historic Howelsen Hill, Steamboat’s outdoor playground. The trails of Emerald are beautiful this...
4m 8m
24
JUN
13

Fort Collins, CO
$25 -$40
Sam’s Rainbow Run: Honoring a Legacy of Love and Kindness I started Sam’s Rainbow Run as a way to honor Sam’s legacy and keep his spirit alive. Sam was passionate about helping those less...
5K
12
JUN
13

Littleton, CO
$35 -$45
Stepping Stone Support Center and Trailhead Community have come together to present this amazing event to benefit adults with developmental disabilities, raising both awareness and funds to give...
2K 5K
24
JUN
13

Walsenburg, CO
$35
This is a 5k run and "fun run", walk for all abilities _ Walkers Welcome!! The route will loop the Lake at Lathrop State Park which was just voted Colorado's Favorite State Park!!   This event is...
5K
3
JUN
13

Colorado Springs, CO
$25
How fast can you run a mile? What if you got to do it on a downhill? Join the Pikes Peak Road Runners and RunMental: Physical Therapy and Performance Coaching for the Springs Downhill Mile on...
41
JUN
13

Thornton, CO
$17 -$85
Every Registration IncludesGreat Swag - designer shirtCustom medalChip-timing with live results and awardsFree photosGreat snacks at the finish line!Plenty of fun!Grab your friends and family,...
1m 5K 10K 15K
32
JUN
13

Broomfield, CO
$35
Grab those tutus and come run with us to raise money for the Colorado Conservatory of Dance. This run/walk will be a party full of smile, music, and dancing! The 5K is a 3 loop course on a...
5K
22
JUN
14

Colorado Springs, CO
$15 -$100
The Garden of the Gods Ten Mile, 10K, and Trail Run® is the premier race of Colorado Springs, coursing through the 300′ towering sandstone rock formations of Garden of the Gods Park, including...
10K 10m
46
JUN
14

Colorado Springs, CO
The Garden of the Gods Little Horn and Big Horn Kids Races One lap (.5 M) around Rock Ledge Ranch for the little horns. Two laps (1 M) for the big horns. 
37
JUN
14

Littleton, CO
$40 -$84
                                               Run the Race. Stay for the Party. 
5K 10K
16